-77.03% is the change from 936 to 215
Calculation steps:
[( 215 - 936 ) ÷ 936] x 100 = -77.03%
Formula
Percentage change = [(215 - 936) / 936] x 100
Subtract the new number by the original number
215 - 936 = -721
-721 ÷ 936 = -0.7702991452991453
-0.7702991452991453 x 100 = -77.03%